Assessment of groundwater vulnerability based on the modified DRASTIC model: a case study in Baicheng City, China

Abstract

Accurate assessment of groundwater vulnerability objectively reflects an area's potential for groundwater pollution and provides a reference basis for pollution control and prevention. The main objective of this study was to modify the original DRASTIC model to improve the consistency of groundwater vulnerability assessment results with regard to the actual conditions of the study area. To optimize the assessment objectivity, two additional factors that are influenced by human activities (land use and degree of groundwater extraction) were added to form the DRASTICLE model. Then, based on the correlation between all factors and measured nitrate concentrations, the improved

Desastres naturais em São Lourenço do Sul-RS. Coleção diagnóstico dos desastres naturais na metade sul do Rio Grande do Sul

“…No entanto, o método GOD tem sido amplamente utilizado e validado em diversas aplicações, como na avaliação da vulnerabilidade das águas subterrâneas em áreas urbanas e industriais, na identificação de áreas prioritárias para a proteção da qualidade da água e na elaboração de planos de gestão dos recursos hídricos subterrâneos (Lu et al, 2021;Aslam et al, 2020;Yang et al, 2020;Huang et al, 2018;Wang et al, 2017;Zhang et al, 2017;Rezaei et al, 2016;Liu et al, 2014;Shen et al, 2012). Além disso, o método GOD é uma ferramenta útil para a tomada de decisão em questões relacionadas à gestão ambiental, planejamento urbano e desenvolvimento sustentável (Foster, 2006).…”

Application of Modified DRASTIC Method for the Assessment and Validation of Confined Aquifer Vulnerability in Areas with Diverse Quaternary Deposits

“…Classifications for the resulting vulnerability indexes are established based on their values, e.g., divided into five classes which have equal intervals [11,27,28]. Hamza et al [9] propose a categorisation by dividing the vulnerability index values into five equal classes using the percentage range: "very low" (10.00-28.99), "low" (29.00-46.99), "medium" (47.00-64.99), "high" (65.00-82.99) and "very high" (83.00-100).…”

“…However, existing studies mainly focus on assessing groundwater vulnerability in unconfined aquifers [4,11,12], while relatively few studies address the complex hydrogeological situation of confined aquifers [13][14][15]. In regions where the main useful aquifer is confined, a modification to the DRASTIC method is needed to achieve an accurate vulnerability assessment [13,15].…”